The character of Joan (Jane Carr), a lady's maid, was introduced at a few hours' notice to say the lines that Edward the footman (Christopher Beeny) would have said in this episode. Beeny had been badly injured in a motorbike accident on his way to the rehearsal on the day before recording and at the time it was thought that he would not survive his injuries. Hasty modifications were made to the script, with Beeny's absence being explained by saying that Edward was on holiday. In the following episode, A Family Gathering (1973), it was mentioned that Edward had broken his leg when he fell down stairs. Thankfully Beeny recovered and was able to appear as Edward in the following season's episodes.
There are two moments in this episode that foreshadow Lady Marjorie's ultimate fate on the Titanic. Mrs Bridges worries about Lady Marjorie crossing the English channel, as she fears the ship might sink. When Lady Marjorie arrives home, Mr Bellamy expresses his relief that she has had a safe journey.
This episode takes place in March 1910.
Sarah and Thomas have been married since 1969. She may have been pregnant in real life when this was filmed in 1973-4.